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Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097

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BuyFindarrow_forward

Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

The term proof is defined as twice the percent by volume of pure ethanol in solution. Thus, a solution that is 95% (by volume) ethanol is 190 proof. What is the molarity of ethanol in a 92 proof ethanol-water solution? Assume the density of ethanol, C2H5OH, is 0.79 g/cm3 and the density of water is 1.0 g/cm3.

Interpretation Introduction

Interpretation: The given molarity of Ethanol has to be calculated.

Concept Introduction:

Concentration can be defined in terms of molarity as moles of solute per volume of solution in litres. It can be given by the expression,

Molarity=massofsolutevolumeofsolution

Explanation

Record the given data from question

Density of Ethanol= 0.79g/cm3

Volume of Ethanol=

46mL

Molecular weight of Ethanol=

46.07g/mole

To find the mole of Ethanol

A 92 proof ethanol solution is 46% C2H5OH by volume. Assume 100mL of solution:

moleofEthanol=46mLC2H5OH×0

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Ch-11 P-1ALQCh-11 P-2ALQCh-11 P-3ALQCh-11 P-4ALQCh-11 P-5ALQCh-11 P-6ALQCh-11 P-7ALQCh-11 P-8ALQCh-11 P-9ALQCh-11 P-10ALQCh-11 P-11SRCh-11 P-12SRCh-11 P-13SRCh-11 P-14SRCh-11 P-15SRCh-11 P-16SRCh-11 P-17QCh-11 P-18QCh-11 P-19QCh-11 P-20QCh-11 P-21QCh-11 P-22QCh-11 P-23QCh-11 P-24QCh-11 P-25QCh-11 P-26QCh-11 P-27QCh-11 P-28QCh-11 P-29ECh-11 P-30ECh-11 P-31ECh-11 P-32ECh-11 P-33ECh-11 P-34ECh-11 P-35ECh-11 P-36ECh-11 P-37ECh-11 P-38ECh-11 P-39ECh-11 P-40ECh-11 P-41ECh-11 P-42ECh-11 P-43ECh-11 P-44ECh-11 P-45ECh-11 P-46ECh-11 P-47ECh-11 P-48ECh-11 P-49ECh-11 P-50ECh-11 P-51ECh-11 P-52ECh-11 P-53ECh-11 P-54ECh-11 P-55ECh-11 P-56ECh-11 P-57ECh-11 P-58ECh-11 P-59ECh-11 P-60ECh-11 P-61ECh-11 P-62ECh-11 P-63ECh-11 P-64ECh-11 P-65ECh-11 P-66ECh-11 P-67ECh-11 P-68ECh-11 P-69ECh-11 P-70ECh-11 P-71ECh-11 P-72ECh-11 P-73ECh-11 P-74ECh-11 P-75ECh-11 P-76ECh-11 P-77ECh-11 P-78ECh-11 P-79ECh-11 P-80ECh-11 P-81ECh-11 P-82ECh-11 P-83ECh-11 P-84ECh-11 P-85ECh-11 P-86ECh-11 P-87ECh-11 P-88ECh-11 P-89ECh-11 P-90ECh-11 P-91AECh-11 P-92AECh-11 P-94AECh-11 P-95AECh-11 P-96AECh-11 P-97AECh-11 P-98AECh-11 P-99AECh-11 P-100AECh-11 P-101AECh-11 P-102AECh-11 P-103AECh-11 P-104AECh-11 P-105AECh-11 P-106AECh-11 P-107AECh-11 P-108AECh-11 P-109AECh-11 P-110CWPCh-11 P-111CWPCh-11 P-112CWPCh-11 P-113CWPCh-11 P-114CWPCh-11 P-115CWPCh-11 P-116CWPCh-11 P-117CWPCh-11 P-118CPCh-11 P-119CPCh-11 P-120CPCh-11 P-121CPCh-11 P-122CPCh-11 P-123CPCh-11 P-124CPCh-11 P-125CPCh-11 P-126CPCh-11 P-127CPCh-11 P-128CPCh-11 P-129CPCh-11 P-130IPCh-11 P-131IPCh-11 P-132IP

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